fix: Do not discard const type qualifier

[hyperupcall]

In the changed code, name is assigned a pointer, that was some offset value from manifest_names.

manifest_names is defined like so:

extern const char *manifest_names[];

In all cases, name is being passed into the fs_read function, which has the following declaration:

char *fs_read (const char *path);

Because the "source" and "destination" of name has a type of const char *, changing name to match that improves consistensy. This also fixes a -Wdiscarded-qualifiers warning that may show upon compilation.